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Phenolic profile, tocopherols and antioxidante activity of watercress

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dc.contributor.authorPinela, José
dc.contributor.authorDias, Maria Inês
dc.contributor.authorCarvalho, Ana Maria
dc.contributor.authorOliveira, Beatriz
dc.contributor.authorBarros, Lillian
dc.contributor.authorFerreira, Isabel C.F.R.
dc.date.accessioned2018-02-12T14:30:56Z
dc.date.available2018-02-12T14:30:56Z
dc.date.issued2017
dc.description.abstractWatercress (Nasturtium officinale R. Br.) is a cruciferous vegetable of the Brassicaceae famity frequently classed as superfood. Several epidemiological studies have established a positive correlation between its consumption and a reduced risk of chronic diseases such as diabetes, cardiovascular diseases and câncer [1, 2]. These health-promoting effects can be attributed to antioxidant nutrients (such as tocopherols) and non-nutrients (such as phenolic compounds), which may act synergistically and offer protection against oxidative stress and degenerative diseases. This study was carried out aiming to characterize the watercress profile in phenolic compounds and tocopherols and evaluate its antioxidant properties. Wild specimens of watercress were collected in a stream located in the munidpality of Bragança, Portugal, and promptly analyzed. Phenolic compounds were analyzed by HPLC-DAD-ESI/MS and tocopherols by HPLC with a fluorescence detector [3, 4]. Hydroalcoholic extracta were prepared by solid-liquid extraction and four in vitro assays were performed to evaluate the antioxidant capacity, which was assessed via DPPH free-radical scavenging activity, reducing power (ferricyanide/Prussian blue assay), p-carotene bleaching inhibition (p-carotene-linoleate model system), and thiobarbituric acid reactive substances (TBARS) formation inhibition in brain homogenates [3,4]. Watercress was particularly rich in flavonoids, mainly quercetin and isorhamnetin derivatives. Interesting amounts of hydroxycinnamic acids were also detected. a-Tocopherol was identified as the predominant isoform, followed by y- and p-tocopherols. The low ECso values for the TBARS formation and p-carotene bleaching inhibition revealed that the hydroalcoholic extracts have a high lipid peroxidation inhibition capacity. These results support the consumption of watercress as source of phytochemicals potentially capable of inhibiting free radicalmediated reactions and its dassification as a superfood.pt_PT
dc.description.sponsorshipThe authors are grateful to the Foundation for Scíence and Technology (FCT, Portugal) and FEDER under Pmgramme PT2020 for financiai support to CIMO (UID/AGR/00690/2013): to FCT/MEC for financiai support to REQUIMTEAAQV (UID/QUI/50006/2013 - POCI/01/0145/FERDEW007266); and to FCT for the grant (SFRH/BD/92994/2013, funded by the Eumpean Social Fund and MEC thmugh POCH) attributed to J. Pinela.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationPinela, José; Dias, Maria Inês; Carvalho, Ana Maria; Oliveira, M.B.P.P.; Barros, Lillian; Ferreira, Isabel C.F.R. (2017). Phenolic profile, tocopherols and antioxidante activity of watercress. In 3rd Symposium on Medicinal Chemistry of University of Minho. Bragapt_PT
dc.identifier.urihttp://hdl.handle.net/10198/15681
dc.language.isoporpt_PT
dc.peerreviewedyespt_PT
dc.relationRECOVERY OF THE SUSTAINABLE USE OF TRADITIONAL FOODS THROUGH EMERGING PRESERVATION TECHNOLOGIES
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.titlePhenolic profile, tocopherols and antioxidante activity of watercresspt_PT
dc.typeconference object
dspace.entity.typePublication
oaire.awardNumberUID/QUI/50006/2013
oaire.awardNumberSFRH/BD/92994/2013
oaire.awardTitleRECOVERY OF THE SUSTAINABLE USE OF TRADITIONAL FOODS THROUGH EMERGING PRESERVATION TECHNOLOGIES
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FQUI%2F50006%2F2013/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBD%2F92994%2F2013/PT
oaire.citation.conferencePlaceBraga, Portugalpt_PT
oaire.citation.title3rd Symposium on Medicinal Chemistry of University of Minhopt_PT
oaire.fundingStream5876
person.familyNamePinela
person.familyNameDias
person.familyNameCarvalho
person.familyNameBarros
person.familyNameFerreira
person.givenNameJosé
person.givenNameMaria Inês
person.givenNameAna Maria
person.givenNameLillian
person.givenNameIsabel C.F.R.
person.identifierID G-7399-2011
person.identifier469085
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person.identifier.ciencia-id9616-35CB-D001
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person.identifier.orcid0000-0001-7523-1637
person.identifier.orcid0000-0001-8744-7814
person.identifier.orcid0000-0001-5508-5935
person.identifier.orcid0000-0002-9050-5189
person.identifier.orcid0000-0003-4910-4882
person.identifier.ridB-4466-2014
person.identifier.ridM-8242-2013
person.identifier.ridJ-3600-2013
person.identifier.ridE-8500-2013
person.identifier.scopus-author-id54392272800
person.identifier.scopus-author-id54388787000
person.identifier.scopus-author-id20336503900
person.identifier.scopus-author-id35236343600
person.identifier.scopus-author-id36868826600
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typeconferenceObjectpt_PT
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